My dodge is showing P2503; P2509; and PO513. How do fix?

Question

, its showing P2503; P2509; and PO513..Batteries Unhooked for several days, Altenator pushin 11V

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Answer 1

P2503 Charging system output low

P2509 PCM power input signal intermittent

P0513 Invalid Skim key

The low charging system is needs to be checked, from the battery to the alternator there is a fuseable link, that should be checked for a open condition